the role of identity enabled web services in cloud … role of identity enabled web services in...

The Role of Identity Enabled Web Services

in Cloud Computing

April 20, 2009

Patrick Harding

CTO

Agenda

●  Web Services and the Cloud

●  Identity Enabled Web Services

●  Some Use Cases and Case Studies

●  Questions

Copyright (c) 2009 Ping Identity Corporation 2

Web Services and The Cloud


•  As Distributed Computing Evolves, Users are Pushed Further and Further Away from Applications

•  How Do You Securely Control Access in an Increasingly Distributed World While Supporting Emerging Technologies like Web Services?

Applications Rely on Identity to Meet Fundamental Business Requirements

Copyright (c) 2009 Ping Identity Corporation

SaaS BPO

Cloud Apps Partner

Apps

4

Web Services Security Soup


Customers

Business Partners

Customer Service Reps

3rd Party Mashups

Web Service

SaaS

WS-Security

SAML

SSL

PKI

WS-Trust

REST

SOAP

XMLSignature

oAuth

Kerberos

X.509

Mobile

Web Portal

WS-SecurityPolicy

WS-SecureConversation

Gadgets/

Widgets

Username/Password

SaaS

Web Services and the Cloud

●  Cloud Computing & SaaS are changing the requirements for addressing how to secure web services

●  Cloud applications & SaaS will need to securely access on-premise data

 Google Enterprise Developer Platform

  SaaS Integration

●  On premise applications will need to access SaaS API’s

  Salesforce.com API’s are heavily used - 2 Billion API calls a month


Security & Integration

7 Copyright (c) 2009 Ping Identity Corporation

Identity Enabled Web Services


•  Web Services Principles

•  Standards-based, Loosely Coupled, Scalable Applications

•  Most Current Security Approaches Violate Web Service Principles

•  Customized, Tightly Coupled, Not Scalable, No Delegation

•  e.g. Mutually Authenticated TLS, User Identity in SOAP Body

•  Each Web Services app must know in advance where identity information is located in SOAP body; TLS session is point-to-point

Securing Web Services Today


•  Encrypted, Signed, Standard WS-Security SOAP Message

•  WS-Security SOAP Header Includes Standard WS-Trust Security Token with Identity Information

WS-Security Enables a New Standards-based Trust Model


Key Question: How To Create Security Tokens?

WS-Trust Security Token in WS-Security Header

10

11

WS-Trust Basics

●  WS-Trust is an OASIS standard and an extension of WS-Security

●  WS-Trust enables security token exchange

●  A WS-Trust STS Issues and Validates Security Tokens

  Kerberos, UserName/Password, X.509, SAML, ….


12

Identity Enabled Web Services

●  WS-Security SAML Token Profile

●  Enables Delegation

●  STS Implements Federated Identity Concepts

  Attribute Contracts

  Session Integration

  Attribute Retrieval

  Subject, Attribute and Role Mapping

STS STS


13

Centralized Security Token Processing

Every Web Service Client and Provider Processes Security Tokens

●  Gets Identity-Related Security and Crypto Code Out of Applications

●  Centralized Administration, Auditing

●  Requestor and Recipient Based Policy and Behavior

●  Enables Web Services SSO with both Web Clients and Rich Clients

●  Supports Client-Side, Provider-Side or Both

STS Handles All Security Token Processing

Without STS With STS

STS


What about oAuth?

•  Open standard to secure REST based web service API’s between SaaS/Web 2.0 applications

•  Driven by SaaS/Web 2.0 community

●  oAuth handles delegated web service authentication

  Secure API authentication

  Secure access to web service data API’s

 Generally with explicit user consent


‘Two Legged’ oAuth

oAuth

Service Provider

(Enterprise)

oAuth Consumer

(Google EDP)

1. Consumer Key and Secret

3. Call API with oAuth Signature API

STS

Browser

2. Request

Resource


‘Three Legged’ oAuth


Oauth

Service Provider OAuth Consumer

Browser

1. Consumer Key and Secret

6. User Redirect back with Authorized Request Token

5. User

Authenticates &

Handles User Consent

4. User Redirect with

Unauthorized Request Token

8. Call API with oAuth Signature & Access Token

2. Request

Resource

3. Get Unauthorized Request Token

7. Exchange Authorized Token for AccessToken API

10. Display

Resource

Use Cases & Case Studies


Web Services Use Cases

•  Portal Initiated Web Services •  Browser based app requires user specific data from internal or

external web services

•  Security for Web Service Providers and SaaS API’s •  Web service providers require authenticated user to authorize

access to user specific data

•  Rich Desktop Clients •  Desktop client applications SSO to web service providers inside

or outside of security domain


Federal Government

Web Service

Provider A

Browser Web Portal

SOAP API

Active Directory

Web Service

Provider B SOAP

API

STS

Enclave 1

Enclave 2

Enclave 3

Active Directory STS

Active Directory STS

1.

2.

3.

4.

5.

6.

19

Large Electronics Retailer

Retailer

Browser

3rd Party

Shopping Applications

Partner

STS

SOAP API

Customer DB

oAuth WS-*

REST API

1.

2.

3.

20

Recommendations

●  Leverage SSL for Confidentiality

●  Use SAML Tokens to Identity Enable SOAP Web Services

●  Leverage a WS-Trust STS to Centralize SAML Token & Federation Processing

●  Consider oAuth to secure your REST API’s

●  … and check out the new PingFederate 6.0 up the back


Questions


the role of identity enabled web services in cloud … role of identity enabled web services in...

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